Batteries for ControlLogix Controllers $$ ??

I just received a quote for batteries for ControlLogix Controllers , and I was shocked by the price.

The 1756-BA1 is $79.92 ea. and the 1756-BA2 is $83.47 ea.

Have any of you purchased these from any battery warehouses ?
If so , where do you recommend getting them.

Thanks so much for your help.

The BA1, I beleive is for the L1 and L55 processors. The BA2, I think was for the L6x Processors. Did you look on the web? I saw BA1 batteries for < $20. But I don't know their quality. The BA1 is a 3V lithium with a wired connector.

I see Interstate Batteries have them for about $17.00.